EP0920390A1 - Elektromechanisch betätigbare feststellbremse für kraftfahrzeuge - Google Patents
Elektromechanisch betätigbare feststellbremse für kraftfahrzeugeInfo
- Publication number
- EP0920390A1 EP0920390A1 EP98919164A EP98919164A EP0920390A1 EP 0920390 A1 EP0920390 A1 EP 0920390A1 EP 98919164 A EP98919164 A EP 98919164A EP 98919164 A EP98919164 A EP 98919164A EP 0920390 A1 EP0920390 A1 EP 0920390A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- parking brake
- electromechanically actuated
- brake according
- actuated parking
- rotor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D65/00—Parts or details
- F16D65/14—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position
- F16D65/16—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position arranged in or on the brake
- F16D65/22—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position arranged in or on the brake adapted for pressing members apart, e.g. for drum brakes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
- B60T13/74—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with electrical assistance or drive
- B60T13/741—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with electrical assistance or drive acting on an ultimate actuator
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T7/00—Brake-action initiating means
- B60T7/02—Brake-action initiating means for personal initiation
- B60T7/08—Brake-action initiating means for personal initiation hand actuated
- B60T7/10—Disposition of hand control
- B60T7/107—Disposition of hand control with electrical power assistance
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D63/00—Brakes not otherwise provided for; Brakes combining more than one of the types of groups F16D49/00 - F16D61/00
- F16D63/004—Brakes not otherwise provided for; Brakes combining more than one of the types of groups F16D49/00 - F16D61/00 comprising a rotor engaged both axially and radially by braking members, e.g. combined drum and disc brakes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2121/00—Type of actuator operation force
- F16D2121/18—Electric or magnetic
- F16D2121/24—Electric or magnetic using motors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2125/00—Components of actuators
- F16D2125/18—Mechanical mechanisms
- F16D2125/20—Mechanical mechanisms converting rotation to linear movement or vice versa
- F16D2125/34—Mechanical mechanisms converting rotation to linear movement or vice versa acting in the direction of the axis of rotation
- F16D2125/40—Screw-and-nut
Definitions
- the invention relates to an electromechanically actuated parking brake for motor vehicles, consisting of a drum brake and an actuating unit actuating the drum brake, the drum brake having two brake shoes and an expansion lock which cooperates with the actuating unit by means of a force transmission element and wherein the actuating unit consists of an electric motor and one between the Electric motor and the power transmission element arranged reduction gear.
- Such an electromechanically actuated parking brake is such. B. from the German patent application DE 41 29 919 AI known.
- the disclosure content of the publication mentioned is, among other things, a combination of an electric motor acting as a servomotor with a drum brake can be found, the electric motor being arranged in the vicinity of the associated wheel brake or can also form a structural unit with the wheel brake.
- the known prior art does not provide any information about the specific design of the actuating unit.
- an object of the present invention to propose an electromechanically actuated parking brake of the type mentioned at the outset which, with high reliability and functional reliability, has a small overall size, in particular a small axial length of the actuating unit.
- This object is achieved in that the rotor of the electric motor is hollow or tubular and encompasses the reduction gear radially.
- the reduction gear is designed as a spindle drive, the spindle of which forms the force transmission element and the spindle nut of which is in force-transmitting connection with the rotor.
- the spindle drive can either be designed to be self-locking or not self-locking. While the first-mentioned solution automatically fulfills the legal requirement for a currentless, mechanical locking, a non-self-locking spindle drive, e.g. B. a ball screw, an additional mechanical or electromechanical lock can be provided.
- a non-self-locking spindle drive e.g. B. a ball screw
- an additional mechanical or electromechanical lock can be provided.
- the locking device is formed by an armature of a holding magnet which can be displaced axially relative to the rotor and which can be brought into engagement with a friction disk which interacts with the rotor when the electric motor is de-energized by means of a spring.
- the armature can preferably be actuated by the magnetic stray flux generated by the stator of the electric motor.
- the locking device is formed by an electromagnetic braking device cooperating with the rotor.
- optimal power transmission between the power transmission element and the expansion lock is thereby achieved. is sufficient that the spindle forming the power transmission element is mounted against rotation.
- An inexpensive manufacture of the invention is that the housing of the electric motor is designed as a deep-drawn sheet metal part.
- a further advantageous embodiment of the subject matter of the invention provides that the housing has an axial tubular extension protruding into the interior of the rotor, which receives the end of the spindle facing the expansion lock against rotation and preferably an inner polygon profile has that cooperates with the correspondingly shaped end of the spindle.
- the rotor is designed as a tubular sheet metal part that forms the spindle nut of the spindle drive.
- An alternative solution is that a ball screw nut is pressed into the rotor.
- the rotor is mounted at one end in a fixed bearing which is held in the housing of the electric motor by rolling up the rotor end.
- the housing of the electric motor is closed at its end facing away from the drum brake by means of a bearing cover which is fixed by rolling the housing in.
- the bearing cover preferably receives a floating bearing in which the other end of the rotor is mounted.
- the bearing cover advantageously limits a hollow space that serves to accommodate an electronic circuit for controlling the electric motor. This measure allows the electronics used to control the motor to be integrated into the motor housing.
- the bearing cover is made of plastic and has a cable bushing through which a preferably overmolded connecting line can be passed.
- a perfectly functioning power transmission between the actuation unit and the expansion lock of the drum brake is achieved according to the invention by using a short, flexible steel cable which is pressed or squeezed in the power transmission element and is provided with a pulling eye at its end facing the expansion lock.
- the steel cable consists preferably of a steel strand, which is provided with a plastic sheath.
- the steel cable is protected by a bellows against the ingress of dirt into the electric motor, the end of the bellows facing away from the towing eye being O-shaped and being received by a preferably circular recess provided on the housing of the electric motor.
- the bellows end facing the expansion lock is welded to the plastic sheathing, in particular ultrasonically welded, and thus securely sealed against the ingress of dirt or moisture.
- the drive motors for the actuating unit of the parking brake according to the invention include, in particular, niche commutated DC electric motors or DC brush motors in question.
- the motor types mentioned are particularly suitable for generating high torques from standstill.
- a planetary gear is arranged between the rotor and the reduction gear, the sun gear of which is formed at one end of the rotor.
- the planet gears preferably cooperate with an internal ring gear which is formed on the inside of the housing of the electric motor. It is particularly useful if the planet gears are arranged on a radial collar of the spindle nut, which cooperates in its area adjacent to the collar with a radial bearing which is supported on the housing of the electric motor.
- An optimal, space-saving fastening of the actuation unit is achieved in a further advantageous embodiment of the invention in that the housing of the electric motor is provided with a constriction, which is used to fasten the actuation unit by rolling it into a cutout in a dirt sheet protecting the drum brake from contamination.
- the drum brake can preferably be designed as a duo-servo brake.
- FIG. 1 shows a first embodiment of the electromechanically actuated parking brake according to the invention in the axial al cut
- FIG. 2 shows a second embodiment of the subject of the invention in a representation corresponding to FIG. 1, and
- FIG. 3 shows a third embodiment of the subject of the invention in a representation corresponding to FIG. 1.
- the electromechanically actuated parking brake according to the invention shown in the drawing essentially consists of a drum brake known per se, preferably a duo-servo brake 1, and an actuating unit 2, the housing 3 of which is designed as a sheet metal part and is not described in more detail in one designated section of a drum plate 1 protecting dirt from dirt 4 is attached.
- the housing 3 has a constriction 26, which enables the edge region of the dirt plate 4 which delimits the cutout to be rolled up.
- the actuation or drive unit 2 is in force-transmitting connection with an expansion lock 5, which enables mechanical actuation of two brake shoes, one of which is shown and provided with the reference number 6. By actuation, the brake shoes 6 are brought into engagement with a brake drum 7.
- the actuation unit 2 consists of an electric motor 8, a reduction gear 9 and a power transmission element 10, which is coupled to the expansion lock 5 mentioned above via a steel cable 14.
- the protection of the electric motor 8 and the steel cable 14 against contamination is preferably provided by an elastic bellows 15 arranged between the electric motor 8 and the expansion lock 5, the edge area associated with the housing 3 of which is formed in an O-ring shape and is arranged in a circular recess 25 formed on the housing 3 in such a way that that it is clamped between the housing 3 and a carrier plate 27.
- the bellows end facing the expansion lock 5 is welded to the plastic casing, in particular ultrasonically welded, as a result of which the steel cable 14 is reliably sealed against dirt and moisture.
- the electric motor 8 shown in the example shown in FIG. 1 is designed as an electronically commutatable motor, a design as a DC brush motor also being possible.
- the stator of the electric motor 8, designated by the reference number 11, is arranged immovably in the housing 3 drawn from sheet metal, while its rotor 12 is preferably designed as a tubular sheet metal part, on the surface of which permanent magnet segments 13 are glued.
- the rotor 12 is supported at its end facing the drum 7 in a fixed bearing 18 held in the housing 3 by rolling in the rotor end, while a floating bearing 19 ensures the bearing of its end facing away from the drum 7.
- the reduction gear 9 is preferably arranged coaxially to the rotor 12, radially encompassed by the latter.
- the reduction gear 9 shown therein is designed as a self-locking spindle drive, the spindle 16 of which forms the force transmission element 10 and the spindle nut 17 of which is coaxial with the Rotor 12 arranged, with the rotor 12 preferably integrally formed tubular part is formed.
- the spindle 16 is secured against rotation by an axial tubular extension 20 of the housing 3, which preferably extends into the interior of the rotor 12.
- the extension 20 mentioned here has an inner polygonal profile which interacts with the correspondingly shaped end of the spindle 16.
- the housing 3 of the actuating unit 2 is closed to the outside by a bearing cover 21 which is fixed by rolling in the edge region of the housing 3.
- the bearing cap 21, which is preferably made of a suitable plastic and in which the aforementioned floating bearing 19 is arranged, delimits an annular cavity 22 in the housing 3 of the actuating unit 2, in which, for example, electronic components (not shown) can be arranged, which are used to control the electric motor 8 serve.
- a cable bushing 23 is provided in the bearing cover 21, through which a connecting line 24, preferably overmolded, which leads to the stator 11 of the electric motor 8 can be passed.
- the reduction gear 9 mentioned in connection with FIG. 1 is designed as a non-self-locking spindle drive or a ball screw drive 28, 29, 30.
- the ball screw drive consists of a threaded spindle 28 and a ball screw nut 29, which is preferably pressed into the rotor 12, the rotational movement of which is converted into a translatory movement of the threaded spindle 28 by means of rows of balls 30.
- the ball screw shown 28-30 cooperates with a locking device 31, which in the example shown is an armature 33 of a holding magnet is formed, which can be actuated by the magnetic stray flux generated by the stator 11 of the electric motor 8.
- the preferably pot-shaped armature 33 is secured against rotation and axially displaceable on the rotor 12 and is pressed in the de-energized state of the stator 11 by a plate spring 32 against a friction surface 34 which is formed on the bearing cap 21 mentioned above.
- the armature 33 is attracted by the action of the leakage flux generated by the stator 11 against the force of the plate spring 32 and thus disengaged from the friction surface 34, so that the rotor 12, entraining the armature 33, can rotate freely .
- an electromagnetic braking device which interacts with the rotor 12 and can be actuated independently of the current supply to the stator 12.
- the electric motor 8 is designed as a DC brush motor, the stator of which is formed by permanent magnet segments 36 arranged in the housing 35 of the actuation unit.
- the rotor to which current is supplied by means of a collector 37, is formed by a double-bearing tube 39 carrying an armature winding 38, the end region of which, facing the drum (not shown), is designed as a sun gear 40 of a planetary gear designated 50, which is operatively between the electric motor 8 and a reduction gear 51 is connected.
- the structure of the reduction gear 51 corresponds to that of the screw drive shown in Fig. 1, so that a detailed description is unnecessary.
- the sun gear 40 drives planet gears 41, which rotate in a ring gear 42, which is stamped as part of the housing 35 on the inside thereof.
- the planet gears 41 are supported by a radial web 43 which is formed on the end of the tubular threaded nut 44 which faces the drum brake and is not shown and which drives the spindle 45.
- the web 43 which is mounted in the housing 35 via a main bearing 46, thus serves as an output of the planetary gear 50.
- the entire drive or actuation unit is encapsulated, ie protected against the ingress of dirt and moisture via the seals 47 and 48.
- the steel cable 14 is pressed or squeezed within the force transmission element designed as a spindle 45.
- a conical blind bore 60 is provided within the spindle 45, in which the end of the steel cable 14 is received and secured captively by squeezing.
- the steel cable with its plastic casing is compressed in the blind bore of the spindle during the squeezing process in such a way that a moisture-impermeable sealing seat results between the plastic casing and the conical bore surface.
- d. H Moisture located between the steel strand and the plastic sheathing can therefore not get into the interior of the electric motor.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Transportation (AREA)
- Braking Arrangements (AREA)
- Braking Systems And Boosters (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19714046A DE19714046A1 (de) | 1997-04-05 | 1997-04-05 | Elektromechanisch betätigbare Feststellbremse für Kraftfahrzeuge |
DE19714046 | 1997-04-05 | ||
PCT/EP1998/001798 WO1998045152A1 (de) | 1997-04-05 | 1998-03-26 | Elektromechanisch betätigbare feststellbremse für kraftfahrzeuge |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0920390A1 true EP0920390A1 (de) | 1999-06-09 |
EP0920390B1 EP0920390B1 (de) | 2003-11-26 |
Family
ID=7825509
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98919164A Expired - Lifetime EP0920390B1 (de) | 1997-04-05 | 1998-03-26 | Elektromechanisch betätigbare feststellbremse für kraftfahrzeuge |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0920390B1 (de) |
JP (1) | JP2001504417A (de) |
DE (2) | DE19714046A1 (de) |
WO (1) | WO1998045152A1 (de) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109114133A (zh) * | 2017-06-23 | 2019-01-01 | 日信工业株式会社 | 鼓式制动装置 |
US11248672B2 (en) | 2013-06-06 | 2022-02-15 | Continental Teves Ag & Co. Ohg | Drum brake which can be operated by an electric motor |
Families Citing this family (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1125067B1 (de) | 1998-10-27 | 2004-06-09 | Continental Teves AG & Co. oHG | Verfahren und vorrichtung zur überwachung der bewegung eines aktuators |
DE19859605B4 (de) * | 1998-12-23 | 2008-02-21 | Continental Teves Ag & Co. Ohg | Verfahren und Vorrichtung zum Ansteuern einer elektromechanisch betätigbaren Feststellbremse |
DE19955080A1 (de) * | 1999-11-15 | 2001-05-17 | Continental Teves Ag & Co Ohg | Betätigungseinheit für eine elektromechanisch betätigbare Feststellbremse für Kraftfahrzeuge |
DE10003207A1 (de) * | 2000-01-26 | 2001-08-02 | Continental Teves Ag & Co Ohg | Kombinierte Trommelbremse für ein Kraftfahrzeug |
US7520192B2 (en) * | 2004-11-18 | 2009-04-21 | Hr Textron, Inc. | Reduced-friction drive screw assembly |
DE112006002895B4 (de) | 2005-10-31 | 2021-12-16 | ZF Active Safety US lnc. | Elektrische Betätigungseinheit für eine Fahrzeugbremsanordnung |
US9175737B2 (en) | 2011-02-02 | 2015-11-03 | Continental Teves Ag & Co. Ohg | Drum brake module which can be operated by electric motor |
JP5844630B2 (ja) | 2011-12-14 | 2016-01-20 | 曙ブレーキ工業株式会社 | ドラムブレーキ式電動駐車ブレーキ装置 |
JP5960534B2 (ja) | 2012-07-27 | 2016-08-02 | 曙ブレーキ工業株式会社 | ドラムブレーキ式電動駐車ブレーキ装置 |
JP5960535B2 (ja) * | 2012-07-27 | 2016-08-02 | 曙ブレーキ工業株式会社 | ドラムブレーキ式電動駐車ブレーキ装置用ケーブル接続装置 |
DE102013224922A1 (de) | 2013-12-04 | 2015-06-11 | Continental Teves Ag & Co. Ohg | Elektromechanisch betätigbare Trommelbremse |
FR3016014B1 (fr) | 2013-12-30 | 2017-03-31 | Chassis Brakes Int Bv | Actionneur avec systeme vis-ecrou irreversible, frein a tambour et dispositif de freinage ainsi equipes |
DE102014112307B3 (de) * | 2014-08-27 | 2016-01-07 | Küster Holding GmbH | Elektrischer Bremsaktuator für Fahrzeuge, insbesondere zur Betätigung von Trommelbremsen |
DE102016209784A1 (de) | 2015-12-10 | 2017-06-14 | Continental Teves Ag & Co. Ohg | Methoden und Vorrichtungen zum gesicherten Lösen eines elektrischen Stellglieds mit Hilfe von einem quasielastischen Löseendanschlag |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
BE628339A (de) * | 1962-02-14 | |||
DE2208936A1 (de) * | 1972-02-25 | 1973-09-06 | Teldix Gmbh | Bremssystem fuer ein fahrzeug |
CH591350A5 (de) * | 1975-05-30 | 1977-09-15 | Bbc Brown Boveri & Cie | |
DE3518715A1 (de) * | 1985-05-24 | 1986-11-27 | Daimler-Benz Ag, 7000 Stuttgart | Feststell-bremseinrichtung |
US4850459A (en) * | 1988-04-19 | 1989-07-25 | Allied-Signal Inc. | Electrically operated drum brake |
DE4129919C2 (de) | 1991-09-09 | 2002-05-29 | Bayerische Motoren Werke Ag | Feststellbremsanlage für Kraftwagen, insbesondere Personenkraftwagen |
US5310026A (en) * | 1992-10-19 | 1994-05-10 | General Motors Corporation | Electric drum brake |
US5769189A (en) * | 1995-03-03 | 1998-06-23 | Lucas Industries Public Limited Company | Automotive parking brake and parking brake system for motor vehicles |
DE19543098C2 (de) * | 1995-05-19 | 1997-03-20 | Continental Ag | Bremsaktor für elektrisch betätigbare Fahrzeugbremse |
-
1997
- 1997-04-05 DE DE19714046A patent/DE19714046A1/de not_active Withdrawn
-
1998
- 1998-03-26 EP EP98919164A patent/EP0920390B1/de not_active Expired - Lifetime
- 1998-03-26 DE DE59810262T patent/DE59810262D1/de not_active Expired - Fee Related
- 1998-03-26 JP JP54231998A patent/JP2001504417A/ja active Pending
- 1998-03-26 WO PCT/EP1998/001798 patent/WO1998045152A1/de active IP Right Grant
Non-Patent Citations (1)
Title |
---|
See references of WO9845152A1 * |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11248672B2 (en) | 2013-06-06 | 2022-02-15 | Continental Teves Ag & Co. Ohg | Drum brake which can be operated by an electric motor |
CN109114133A (zh) * | 2017-06-23 | 2019-01-01 | 日信工业株式会社 | 鼓式制动装置 |
CN109114133B (zh) * | 2017-06-23 | 2021-08-10 | 日信工业株式会社 | 鼓式制动装置 |
Also Published As
Publication number | Publication date |
---|---|
WO1998045152A1 (de) | 1998-10-15 |
DE59810262D1 (de) | 2004-01-08 |
JP2001504417A (ja) | 2001-04-03 |
DE19714046A1 (de) | 1998-10-08 |
EP0920390B1 (de) | 2003-11-26 |
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